J/ApJ/794/82 GeV gamma-ray bursts with the ARGO-YBJ detector (Bartoli+, 2014)
Search for GeV gamma-ray bursts with the ARGO-YBJ detector: summary of eight
years of observations.
Bartoli B., Bernardini P., Bi X.J., Branchini P., Budano A., Camarri P.,
Cao Z., Cardarelli R., Catalanotti S., Chen S.Z., Chen T.L., Creti P.,
Cui S.W., Dai B.Z., D'Amone A., Danzengluobu, De Mitri I.,
D'Ettorre Piazzoli B., Di Girolamo T., Di Sciascio G., Feng C.F., Feng Z.,
Feng Z., Gou Q.B., Guo Y.Q., He H.H., Hu H., Hu H., Iacovacci M., Iuppa R.,
Jia H.Y., Labaciren, Li H.J., Liguori G., Liu C., Liu J., Liu M.Y., Lu H.,
Ma L.L., Ma X.H., Mancarella G., Mari S.M., Marsella G., Martello D.,
Mastroianni S., Montini P., Ning C.C., Panareo M., Perrone L., Pistilli P.,
Ruggieri F., Salvini P., Santonico R., Shen P.R., Sheng X.D., Shi F.,
Surdo A., Tan Y.H., Vallania P., Vernetto S., Vigorito C., Wang H.,
Wu C.Y., Wu H.R., Xue L., Yang Q.Y., Yang X.C., Yao Z.G., Yuan A.F.,
Zha M., Zhang H.M., Zhang L., Zhang X.Y., Zhang Y., Zhao J., Zhaxiciren,
Zhaxisangzhu, Zhou X.X., Zhu F.R., Zhu Q.Q., Zizzi G.,
(the ARGO-YBJ Collaboration)
<Astrophys. J., 794, 82 (2014)>
=2014ApJ...794...82B 2014ApJ...794...82B (SIMBAD/NED BibCode)
ADC_Keywords: Gamma rays ; Spectral types
Keywords: astroparticle physics - gamma-ray burst: general
Abstract:
The search for gamma-ray burst (GRB) emission in the energy range of
1-100 GeV in coincidence with the satellite detection has been carried
out using the Astrophysical Radiation with Ground-based Observatory at
YangBaJing (ARGO-YBJ) experiment. The high-altitude location
(4300 m a.s.l.), the large active surface (∼6700 m2 of Resistive
Plate Chambers), the wide field of view (∼2 sr, limited only by the
atmospheric absorption), and the high duty cycle (>86%) make the
ARGO-YBJ experiment particularly suitable to detect short and
unexpected events like GRBs. With the scaler mode technique, i.e.,
counting all the particles hitting the detector with no measurement of
the primary energy and arrival direction, the minimum threshold of ∼1 GeV
can be reached, overlapping the direct measurements carried out by
satellites. During the experiment lifetime from 2004 December 17 to
2013 February 7, a total of 206 GRBs occurring within the ARGO-YBJ
field of view (zenith angle θ≤45°) have been analyzed.
This is the largest sample of GRBs investigated with a ground-based
detector. Two light curve models have been assumed and since in both
cases no significant excess has been found, the corresponding fluence
upper limits in the 1-100 GeV energy region have been derived, with
values as low as 10-5 erg/cm2. The analysis of a subset of 24 GRBs
with known redshift has been used to constrain the fluence
extrapolation to the GeV region together with possible cutoffs under
different assumptions on the spectrum.
Description:
ARGO-YBJ (Aielli et al. 2012NIMPA.661S..50A 2012NIMPA.661S..50A) is an EAS detector
located at an altitude of 4300 m a.s.l. (atmospheric depth 606 g/cm2)
at the YangBaJing Cosmic Ray Laboratory (30.11°N, 90.53°E)
in Tibet, P. R. China. The ARGO-YBJ detector was completed in the
spring of 2007; however, thanks to its modularity, the data collection
started already in 2004 November (corresponding to the launch of the
Swift satellite), ending in 2013 February, when the detector was
definitively switched off. In this period, a total of 223 GRBs
detected by satellite instruments, occurred inside the ARGO-YBJ field
of view (zenith angle θ≤45°, corresponding to 1.84 sr). The
present analysis was carried out on 206 of them, since the other GRBs
occurred during periods when the detector was inactive or not properly
working.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 82 182 GRBs with No Measured Redshift (z=2 and z=0.6
are Assumed for Long and Short GRBs,
Respectively) Observed by ARGO-YBJ
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See also:
IX/36 : GRANAT/PHEBUS catalog of cosmic gamma-ray bursts
(Terekhov+, 1994-2002)
J/A+A/438/1175 : First INTEGRAL SPI-ACS Gamma-Ray Burst Catalogue (Rau+, 2005)
J/ApJ/829/7 : The third Swift/BAT GRB catalog (past ∼11yrs) (BAT3)
(Lien+, 2016)
J/ApJS/223/28 : The third Fermi/GBM GRB catalog (6yr) (Bhat+, 2016)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- GRB GRB name corresponding to the detection
date in UT (YYMMDD)
11- 18 A8 --- Satel Satellite that detected the burst
20- 25 F6.2 s t90 Burst duration
27- 31 F5.1 s text90 ? Extended burst duration
33- 36 F4.1 deg theta Zenith angle
38- 41 F4.1 --- F Square root of the Fano factor
(Fano, 1947PhRv...72...26F 1947PhRv...72...26F)
43- 46 A4 --- SpType Spectral index (1)
47 A1 --- f_SpType [*] Flag on SpType (2)
49- 52 I4 m2 Adet Detector active area
54- 58 F5.2 --- sigma Statistical significance of the on-source
counts over the background for standard
burst duration
60- 64 F5.2 --- sigmaext ? Statistical significance of the on-source
counts over the background for extended
burst duration
66- 71 E6.2 10-7J/cm2 fsat ? 99% confidence upper limit on the fluence
between 1 and 100 GeV for spectral index
(in erg/cm2) (3)
73- 78 E6.2 10-7J/cm2 f2.5 99% confidence upper limit on the fluence
between 1 and 100 GeV for fixed value -2.5
(in erg/cm2) (4)
80 A1 --- l_Ecut [<] Limit flag on Ecut
81- 82 I2 GeV Ecut ? Cutoff upper limit (5)
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Note (1): "CPL" means that the spectrum measured by the satellite is better
fitted with a cutoff power law.
Note (2): Flag as follows:
* = In case of double power law fit (Band or SBPL functions) the higher energy
spectral index is reported in italics.
Note (3): Using the spectrum determined by satellites. 99% c.l.
Note (4): Assuming a differential spectral index 2.5. 99% c.l.
Note (5): Derived from the fsat fluence upper limit (see the text).
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History:
From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 11-May-2017